Please verify for me

[MNgs500]

I plan on doing some upgrades to the Suzuki. So far based on my budget is to get a K&N lunchbox, drill the stock exhaust (after my custom exhaust mod) and then rejet to: 22.5 pilot 65 mid  137.5 main and 3.5 turns out. I got the jetting info off the post your jet info here based on similar scenerio and I think it will work but with possible exhaust drilling will i need to have different jets?

[MNgs500]

also since the K&N airfilter will be replacing the airbox will i need a small extra filter for the breather hose on the top of the engine/carbs